Apple's divisive new update to iOS 7 has caused a lot of head-scratching among developers - but an interesting tidbit from the new OS might cause a lot of head-shaking too. In a good way.
According to 9to5Mac, one of the features of iOS 7 buried in the software's accessibility options is a limited form of head-tracking, with which users can control their phone by shaking their head.
By moving your head left or right you can control different screens, use it as a home button, change the volume or tap the screen.
While 9to5Mac says the feature is "quite tedious" it's clearly not intended for use by general users, but by those with limited movement.